All too many of the other great tragedies of history — Stalin’s atrocities, the killing fields of Cambodia, the Holocaust, to name but a few — were perpetrated by armed troops against unarmed populations. Many could well have been avoided or mitigated, had the perpetrators known their intended victims were equipped with a rifle and twenty bullets apiece, as the Militia Act required here. If a few hundred Jewish fighters in the Warsaw Ghetto could hold off the Wehrmacht for almost a month with only a handful of weapons, six million Jews armed with rifles could not so easily have been herded into cattle cars.
My excellent colleagues have forgotten these bitter lessons of history. The prospect of tyranny may not grab the headlines the way vivid stories of gun crime routinely do. But few saw the Third Reich coming until it was too late. The Second Amendment is a doomsday provision, one designed for those exceptionally rare circumstances where all other rights have failed — where the government refuses to stand for reelection and silences those who protest; where courts have lost the courage to oppose, or can find no one to enforce their decrees. However improbable these contingencies may seem today, facing them unprepared is a mistake a free people get to make only once.
Fortunately, the Framers were wise enough to entrench the right of the people to keep and bear arms within our constitutional structure. The purpose and importance of that right was still fresh in their minds, and they spelled it out clearly so it would not be forgotten. Despite the panel’s mighty struggle to erase these words, they remain, and the people themselves can read what they say plainly enough:
A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed.
 
Judge Kozinski’s dissent in the case SILVEIRA v LOCKYER (2003).  https://scholar.google.com/scholar_case?case=16599538532304446493